﻿/*   
    Copyright (C) 2009 Galaktika Corporation ZAO

    This file is a part of Galaktika.BusinessMonitor
 
    Galaktika.BusinessMonitor is a free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
      
    You should have received a copy of the GNU General Public License
    along with Galaktika.BusinessMonitor.  If not, see <http://www.gnu.org/licenses/>.
  
    If GPL v.3 is not suitable for your products or company,
    Galaktika Corp provides Galaktika.BusinessMonitor under a flexible commercial license
    designed to meet your specific usage and distribution requirements.
    If you have already obtained a commercial license from Galaktika Corp,
    you can use this file under those license terms.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Galaktika.BI.Silverlight.Services;

namespace Galaktika.BI.Silverlight.ClientApp.Web.Runtime.DataAccess
{
    public class QueryExecutorFactory
    {
        private class MockQueryExecutor : IQueryExecutor
        {
            #region IQueryExecutor Members

            public InvokeResultSchema ExecuteQuery(string connectionString, string query, string sessionId)
            {
                return new InvokeResultSchema() { ContentType = KnownContentTypes.Empty };
            }

            public InvokeResultSchema ExecuteNonQuery(string connectionString, string query, string sessionId)
            {
                return new InvokeResultSchema() { ContentType = KnownContentTypes.Empty };
            }

            public bool Cancel()
            {
                return true;
            }

            #endregion
        }

        public static IQueryExecutor Create(string connectionType)
        {
            if (Enum.IsDefined(typeof(ConnectionType), connectionType))
            {
                ConnectionType type = (ConnectionType)Enum.Parse(typeof(ConnectionType), connectionType);
                switch (type)
                {
                    case ConnectionType.Odbc:
                        return new OdbcQueryExecutor();
                    case ConnectionType.OleDb:
                        return new OleDbQueryExecutor();
                    case ConnectionType.SqlServer:
                        return new SqlServerQueryExecutor();
                    case ConnectionType.Olap:
                        return new AdomdQueryExecutor();
                }
            }

            return new MockQueryExecutor();
        }
    }

    public enum ConnectionType
    {
        OleDb,
        Odbc,
        SqlServer,
        Olap
    }
}
